linux-kernel - Re: [PATCH v2 1/1] mm, memory_hotplug: Initialize struct pages for the full memory section

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 17 Dec 2018 13:28:12 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     David Hildenbrand <david@...hat.com>
Cc:     Gerald Schaefer <gerald.schaefer@...ibm.com>,
        Mikhail Zaslonko <zaslonko@...ux.ibm.com>,
        akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Pavel.Tatashin@...rosoft.com,
        schwidefsky@...ibm.com, heiko.carstens@...ibm.com
Subject: Re: [PATCH v2 1/1] mm, memory_hotplug: Initialize struct pages for
 the full memory section

On Mon 17-12-18 10:38:32, David Hildenbrand wrote:
[...]
> I am wondering if we should fix this on the memblock level instead than.
> Something like, before handing memory over to the page allocator, add
> memory as reserved up to the last section boundary. Or even when setting
> the physical memory limit (mem= scenario).

Memory initialization is spread over several places and that makes it
really hard to grasp and maintain. I do not really see why we should
make memblock even more special. We do intialize the section worth of
memory here so it sounds like a proper place to quirk for incomplete
sections.
-- 
Michal Hocko
SUSE Labs